【作者】 万清华；

【导师】 阮晓红；

【作者基本信息】 河海大学 ， 环境工程， 2007， 硕士

【摘要】 瓯江为浙江省第二大江，位于浙江南部，从温州汇入东海。为拓展温州市区的发展空间，实现温州从滨江城市向滨海城市发展的战略目标的需要，自上世纪70年代，提出了瓯江南口封堵工程。该工程的实施，将改变瓯江河口地区的水流运动及水环境状况。因此，建立瓯江河口平面二维水量-水质耦合模型，进行南口工程实施后瓯江河口水环境影响分析，对于瓯江河口及邻近海域水环境保护具有重要的理论价值及实践意义。论文主要研究内容及其成果包括：(1)系统研究了平面二维水动力模型和水质模型的基本原理和相应的求解方法，选择Delft3D水动力模型和WASP5水质模型用于瓯江河口区域的水量水质数值模拟。(2)利用瓯江河口区域大潮期和小潮期的流场及其水质监测资料，对建立的瓯江河口水动力模型及水质模型，进行率定和验证。验证结果表明，所建立的模型具有较好的模拟精度，能够作为瓯江河口区域水环境模拟的工具。(3)利用WASP5水质模型提供的水量数据接口，通过插值法，由水动力模型网格节点的水位和流速推求水质单元体中心点及单元体界面间的平均流量，实现对Delft3D水动力模型和WASP5水质模型的耦合，建立了瓯江河口平面二维水量水质耦合模型。(4)利用所建立的瓯江河口平面二维水量水质耦合模型，研究了“南口”工程影响下，现状污染排口下的污染带变化情况及其对邻近水域水环境的影响，得出东全堵工程和西全堵工程都会加大污染排口污染带的影响面积，且东全堵工程影响大于西全堵工程，为“南口”工程的“东全堵”、“西全堵”工程方案比选提供了依据。更多还原

【Abstract】 Oujiang River, which is the second river in Zhejiang Province, is located in south of the Province and converges to the East China Sea through Wenzhou City. In order to develop the Wenzhou city from a riverine city to a coastal city, it was put forwarded that the South branch of Oujiang Estuary should be jamed since the 1970s. The implement of the project will change the water flow movement and the water environment. Therefore, building the plant 2D flow-quality in Oujiang estuary, which can be used to analyse the changes of the water environment, is of great significance for the water environment protection in Oujiang Estuary and sea area near. The main contents and results discussed in this paper are as follows:(1) The basic principles and the calculation methods of the hydrodynamic model and water quality model were studied. The Delft3D hydrodynamic model and the water quality analysis simulation program 5 are selected to simulate the water quantity and water quality in Oujiang estuary respectively.(2) The hydrodynamic model and the quality model were verified which use the data of tidal levels, velocities and water quality concentrations. Results shows that the precision of the hydrodynamic model and the quality model which we have built are well and can be used to simulation the water environment in Oujiang estuary area.(3) The water quality analysis simulation program 5 provide a joint of hydrodynamic data. After we calculate the water level and velocities of grid nodes used the hydrodynamic model, the water level, velocities in segment and the flow between segments can be calculated by interpolation method. Based on the changes, the plant 2D flow-quality in Oujiang estuary would be build.(4) With the implemention of the project, the changes of contamination zone around discharge outlet and the effects on the water environment in water area nearby were studied. Both east jammed and the west jammed would increase the contaminated areas, and the east jammed larger than the west jammed. The results can be used as references for the comparison and selection of the project which include the east jammed and the west jammed.更多还原